There are files in everyone's crossfire folder that aren't implemented into the game yet.. however, If you are a GM, i guess you have commands of some sort.. like "Inv-New (weapon-name)" so if you give the right name it works normally and since everyone can see it's textures it's also server sided(in a way).
I was a GM in ace online and i only had to write in chat a command starting with "/"..just like minecraft lol. so i don't see why crossfire GM's shouldn't have some as well.